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```
does friction depends on area under contact force??????
EXPLAIN WITH FBD N LOGICAL  REASON
```
6 years ago

SAGAR SINGH - IIT DELHI
879 Points
```										Dear student,

Friction  force has NO "surface area" component. This is hard to understand (and  it sounds like the teacher who asked this question doesn't quite  understand either...).
Imagine this-- A block of wood with a flat bottom and a legged wooded  stool sit on a smooth inclined plane. Do we have to know the contact  area (surface area) of the block or the stool legs to determine the  angle at which each will slide? No. We merely need to know the applied  weight and the coefficient of friction between the materials.
So why does a dragster have such big smooth tires? Wouldn't thin knobby  bicycle tires do as well? As far as the friction force is concerned,  Yes. But the issue the dragster faces is how to transfer the engine  power to the asphalt to accelerate the car. This involves HUGE problems  of material strength, power, heat and wear that takes the problem far  outside the narrow concerns of friction force.

All the best.
Win exciting gifts by                                    answering the questions on Discussion        Forum.    So      help         discuss     any       query   on        askiitians  forum   and      become an    Elite      Expert    League            askiitian.

Sagar Singh
B.Tech, IIT Delhi

```
6 years ago
Rohit Singh
33 Points
```										yes offcourse..Frictional force depends on the are of contact. you must be knowing that friction force is an electrostatic force which arises due to the attraction b/w the + and - elements of the bodies in contact...now larger the area larger will be the force b/w the bodies.
```
6 years ago
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